Firearm possession in Kenya was very tightly controlled when we lived there. The only time I ever saw a non-uniformed person carrying a pistol the man turned out to be a very (in)famous police detective.
Former British Marine with concealed carry? Maybe...
http://www.gunpolicy.org/firearms/region/kenya
Carrying Guns Openly in Public
In Kenya, carrying a firearm in plain view in a public place is prohibited
Carrying Hidden Handguns in Public
In Kenya, carrying a concealed firearm in a public place is prohibited